<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>

</body>

<script>
  window.onload = function () {
    console.log(1 + "2" + "2")
    console.log(1 + +"2" + "2")
    console.log("A" - "B" + "2")
    console.log("A" - "B" + 2)
  }
</script>

</html>
